Lathe, drill, and like machine



Y 1924. f fig-sional oct' 7' c, w. ENGLISH LATHE, DRILL, AND LIxKE MACHINE (WW www mi ----.11m-

Patented Oct. 7, 1924.

UNITED STATES Vislam PATENT oFrIcE. y j

GEORGE WILLIAM ENGLISH, or sHErEIELD, ENGLAND, AssIGNon To l EOPEE. a WEEAKs LIMITED, or' sHEFEIELD, ENGLAND, A BoDYooEPoEATE OEENGLAND. j

LATHE, DRILL, ANI) LIKE MACHINE.

Application led November T0 all 'whom t 'may concern.' y

Be it known that I, GEORGE WILLIAM ENGLISH, a subject of the King of England,

residing at 2O Club Street, Sheffield, Eng

land, have invented certain new and useful Improvements in or Relating to Lathes, Drills, and like Machines, of which the f0l lowing is a specification, referencel being had therein to the accompanying drawing.

This invention'relates to lathes, drills and like machines, its object being to provide improved means for. centring and holding work to be bored or centred longitudinally. The invention is particularly applicable for boring handles to .receive the tangs of table cutlery and tools whether the handlesare of square, rectangular, round or v any other symmetrical cross section. The invention may also be used for centring work which is required to be held/between centres on a lathe.

According to the present invention two jaws are provided movable towards andv away from each other and each having a coaxial conical recess with its larger diameter facing that of the other. A rest may be provided at about the level of the lower edge of each conical recess, whilst means are provided for preventing rotation of work held in the recesses in relation to thejaws, 'such as for example, byproviding an arm extending from the rests on each side of the axis of the recesses. vPreferably the jaws are carried on a movable work-holder and one of them is relatively fixed thereon with its rest, whilst the rest for the other jaw is ad justable on the work-holder, and this other jaw is movable on thework-holder being conveniently mo-unted in guides or on guide rods carried by the adjustable rest. These guide rods may extend one o-n each side of the axis of the conical recesses to the fixed jaw and a spring tending to close the jaws be furnished on the guide rods. An ejector may be provided operated with the movable jaw to pass above the rest of the fixed jaw and a stationary stop may be provided on the machine adapted to open the jaws and to operate the ejector by contact with an abutment on the movable jaw 'or its guide rods on the movement of the work-holder towards the stop.

The accompanying drawings, of which Figure 1 is'an elevation partly in section and Figure 2`is a plan, represent the pres- 2, 1921. serial No. 512,349.`

ent invention applied to a lathe suitable for boring cutlery and tool lhandles longitudi-- nally. Y

Like reference numerals indicate like parts throughout the drawings. l

The bed 1 of the lathe is pro-vided with a head-stock 2 carrying a tool 3y suitable for boring longitudinally the handles, the tool 3 being rotated from any convenient source of power by means of a belt passing around a pulley 4f.

The bed 1 is also providedv with guides 5 upon which a work-holder 6 is capable of sliding towards and away fromv thelheadstock 2. This sliding movement of thev work-holder 6 maybe effected inany convenient manner, -as for example, by means of alever 7 fulcrumed at 8 to a suitable" bracket Qcarried by the bed 1, the lever 7 being linked as shown at 10 to the workliolder 6. Q i

The work-,holder 6 carries a relatively fixed'j aw 11 which is providedwith a conivcal recess 12 coi-axial with the tool 3. The

larger diameter or wider opening vof this conical recess 12 is arranged to facethe tool Sand at or about its lower edge a rest `13 is provided, conveniently carried by the jaw 11. At'or about the same level a sec-` ond rest 14 is provided on the work-holder 6. The distance between the rest 14 and the In the construction illustrated the mov-y able j aw 16 is carried by two guide rods `18 which slide in suitable holes or guides in'` the rest 14 and fixed jaw 11 on each side of the axis of the tooll 3.

The movable jaw y16 is normally moving towards tli'e fixed jaw 11 up to therest'l/I by means of springs 19 acting between the fixed jaw 11 and an abutment 2O whichv is clamped to the guide rods`18 as shown `at21.

An extractor rod 22 is carried by theabutposition as shown ati nient 2O and its position is preferably adjustable by means of a set screw 23. The extractor rod 22 passes through a suitable hole in. the. fixed jaw 11, the parts being soA arranged that as the movable jaw 16 is moved against the action of the springs 19 the extractor rod 22 moves with it and passes across the top of the rest 13.

In order to prevent rOta/ion of Work in relation to the conical recesses 12, 17 when held therein, the rests 13 and 141 are provided with arms 211 .extending on each side of the axis of the tool 3. In the construction illustrated the rests 13, 14: and their arms 21 are fOrmcd by slotting the material of which they are made.

A stationary stop 25 is provided .on thc bed 1 in the path of the abutment 2O and it willr be appreciated that by moving the work-holder 6 away from the tool 3 the movable jaw 16 will be moved in relation to the jfiwfll against the action of the springs 1 9 by Contact of the abutment 20 with the stationary stop 25. 1Vhen the jaws have thus been .opened the handle or other work to be centred and bored is dropped on to the rests 13 and lil. The work-holder 6 is then moved towards the tool 3, whereby the springs 19 willy re-act to Aclose the jaws, whereupon the work will be accurately cen tred between the conical recesses 17 and 12.

Means are provided for enabling the tool 3 rto enter the coniealrecess 17 (the res cess conveniently extending through the jawj) and further movement of the work` holder `G towards the tool will bring the latter .into operation to bore the work longitudinally. On nio-ving the workfholder back to re-.open the jaws 16, 11 the work will fall .onto the rests 13, 11 and the extractor rod. 22 will then move across the top of the restl pushing the work with it until the work falls on' this rest when it will also leave the rest 14 vand maybeguided clear of the werkeholder by means of a chute indicated in dotted lines at 26.

The machine is preferably adjusted so that when the work is held in the conical work of different lengths by varying the distance between the rest 11 and the relatively fixed jaw 11 and by making' corresponding adjustments in the force exerted by the springs 19 by varying the position of the abutment 2O on the guide rods 18.

As ya modification the spi-ings 19 may be 11e-placed by a wedge or cam moved between the abutment 2O and the relatively fixed jaw 11.

lVhat I claiin is:

1. In a device of the class described, in combination, a rotatable tool; a movable work holder comprising a support, a jaw fixed with respect to the support having a conical recess coaxial with and facing the tool, a rest at the lower edge of said recess, a second rest on the supportbetween the fixed jaw and the tool, means for adjusting the distance between said second rest and the fixed. jaw, a second movable with respect to the support disposed between the second rest and the tool and having a conical recess coaxial with the tool and facing the fixed jaw, means for enablingthe tool to enter the recess in the second jaw and means for moving the second jaw with respect to the fixed jaw; and means for moving the work holder toward and away from the tool.

2. In a device of the class described, in combination, a rotatable tool; a movable work holder comprising a support, a jaw fixed thereon having a conical recess coaxial with and facing the tool, a rest at the lower edge of the recess, a second rest on the support between tlie xed aw and the tool, a guide in said second rest, a rod slidable in the guide, a

movable jaw carried by the rod between the second rest and the tool, said movable jaw having a conical recess coaxial with the tool i and facing the fixed aw, means for enabling the tool to enter the recess, means to move the jaws toward each other, and an ejector rigidly secured to the rod and adapted to move over the first rest when the jaws are separated; and a stationary stop adapted to separate the jaws when the work holder is moved away from the tool.

3. In a device of the class described, in combination, a rotatable tool; a work holder comprising a support, a jaw fixed thereon having a conical recess coaxial with and facing the tool, a rest at the lower edge of the conical recess, a movable on the support between the fixed jaw and the tool having a conical recess coaxial with the tool and facing the fixed jaw, means Vfor enabling the tool to enter the recess of the movable jaw, a spring, tending to move the movable jaw toward the fixed jaw, a second rest on the support at the level of the lower edge of the rests adapted to limit the movement of the movable jaw toward the fixed aw, means for adjusting the distance between the second rest and the fixed jaw, and means on one or both of said rests for preventing rotation of the work; and means for moving the work holder toward and away from the tool. f

,4. In a device of the class described, in combination, a rotatable tool; a movable work holder comprising a relatively fixed and a relatively movable j aw each in align ment with the too-l and means tending to move said vjaws toward each other; means for moving the holder toward. and away from the tool; and means for automatically separating the jaws and ejecting the work therefrom when the holder is moved away from the tool.

5. In lathes, drills and like machines the combination of a rotating tool, a workholder7 means for moving the work-holder relatively to the tool, towards and away therefrom, a relatively fixed jaw on the work-holder having a conical recess coi-axial with the tool with its wider opening facing the tool, a rest at the lower edge of the said conical recess, a movable jaw on the workholder between the fixed jaw and the tool having a conical recess co-axial with the tool with its wider opening facing the fixed jaw, means for enabling the tool to enter the conical recess of the movable jaw, a spring tending to move the mm7n able jaw towards the fixed jaw, a second rest on the work-holder at the level of the lower edge of the conical recesses limiting the movement of the movable jawy towards the fixed jaw, means for adjusting the distance between the second rest and the fixed j aw, an arm extending from a rest on each side of the axis of the said conical recesses, a stationary Stop, and an abutment on the movable jaw contacting therewith on movement of the work-holder away from the tool.

6. In lathes, drills and like machines the combination ofy a rotating tool, a workholder, means for moving vthe work-holder relatively to the tool, towards and away therefrom, a relatively fixed jaw on the work-holder having a conical recess co-axial with the tool with its wider opening facinfr the tool, a rest at the lower edge of the said conical recess, a `movable jaw? on the workholder, between the fixed jaw and the tool havingV a conical recess co-axial with the tool with its wider opening facing the fixed jaw, means for enabling the tool to enter the conical recess of the movable jaw, a spring tending to move the movable jaw towards the fixed jaw, a second rest on the workholder at the level of the lower edge of thel conical recesses limiting the movement of the. movable jaw towards the fixed jaw, means for adjusting the distance between the second rest and the fixed aw, an arm ex tending from a rest'on each side of the axis of the said conical recesses, a stationary stop, an abutment on the movable jaw con-` tacting therewith on movement ofthe workholder away from the tool, and an eject-or carried by the movable jaw capable of mov ing above the rest of the fixed jaw as the movable jaw is moved against the action of its spring. t y In witness whereof I have hereunto set my hand in the presence of two witnesses.

GEORGE WILLIAM ENGLISH.

Witnesses :y

ARTHUR H. GREENWOOD, HAWTHoRN WRIGHT. 

